<template>
    <headerVue> </headerVue>
    <div class="courseContainer">
        <div class="courseContainer">
            <div class="courseInfoTop">
                <div class="info-container">
                    <ul class="route">
                        <li class="route-item" style="cursor: pointer">
                            <router-link to="/course" style="color: #fff">课程</router-link>
                        </li>
                        <li class="route-item"><i class="el-icon-arrow-right"></i></li>
                        <li class="route-item" style="cursor: pointer">
                            {{ courseInfo.discountPrice === 0 ? "免费课" : "会员课程" }}
                        </li>
                        <li class="route-item"><i class="el-icon-arrow-right"></i></li>
                        <li class="route-item">{{ courseInfo.courseName }}</li>
                    </ul>
                    <div class="name">{{ courseInfo.courseName }}</div>
                    <div class="info">
                        <div class="Avat">
                            <img src="../assets/img/Avat62.png" alt="" />
                        </div>
                        <ul class="teacherName">
                            <li class="name-item">
                                {{ courseInfo.courseName }}
                                <img src="../assets/img/teacherStart.png" alt="" />
                            </li>
                            <li class="name-item">金牌讲师</li>
                        </ul>
                        <ul class="access">
                            <li class="access-item">难度</li>
                            <li class="access-item">
                                {{ courseTypeFn(courseInfo.courseLevel) }}
                            </li>
                            <li class="access-item">·</li>
                            <li class="access-item">时长</li>
                            <li class="access-item">{{ courseInfo.totalHour }}个小时</li>
                            <li class="access-item">·</li>
                            <li class="access-item">学习人数</li>
                            <li class="access-item">
                                {{ courseInfo.purchaseCounter + courseInfo.purchaseCnt }}人
                            </li>
                            <li class="access-item">·</li>
                            <li class="access-item">综合评分</li>
                            <li class="access-item">10.00</li>
                        </ul>
                    </div>
                </div>
            </div>
        </div>
        <div class="info-nav">
            <div class="nav-container">
                <div class="chapter-item" @click="active = true">
                    <div :class="active ? 'active1' : ''">章节</div>
                    <div class="line" :class="active ? 'active2' : ''"></div>
                </div>
                <div class="chapter-item" @click="active = false">
                    <div :class="!active ? 'active1' : ''">下载资料</div>
                    <div class="line" :class="!active ? 'active2' : ''"></div>
                </div>
            </div>
        </div>

        <div class="course" v-if="active">
            <div class="main">
                <div class="introduction">
                    <div class="desc">该课程暂无介绍</div>
                    <div class="btn">
                        <button class="btn-item active">立即购买</button>
                        <button class="btn-item" @click='addCart'>加入购物车</button>
                    </div>
                </div>
                <div class="video" v-for="item in courseChapters" :key="item.id">
                    <div class="chapterName">{{ item.chapterName }}</div>
                    <div class="chapterDesc">{{ item.description }}</div>
                    <ul class="videos">
                        <li class="video-item" v-for="k in item.children" :key="k.id">
                            <div class="video-itemIcon">
                                <i class="el-icon-video-camera"></i>
                            </div>

                            <div class="item-name">
                                <span class="shipin">视频：</span>
                                <span class="chapterName">{{ k.chapterName }}</span>
                                <span class="free" v-if="k.publicType === 2">试看</span>
                            </div>
                            <button class="btn-learn" @click="goplay(item, k.id)">开始学习</button>
                            <div class="clearfloat"></div>
                        </li>
                    </ul>
                </div>
            </div>
        </div>

        <div v-else>
            <div v-if="attachments.length > 0">
                <div class="down" v-for="item in attachments" :key="item.id">
                    <div class="source">
                        <span class="downloadCourse">{{ item.attachmentName }}</span>
                        <button class="downloadbtn" @click="downloadSource(item)">
                            下载资料
                        </button>
                    </div>
                </div>
            </div>
            <div v-else>
                <el-empty description="该课程暂无资料"></el-empty>
            </div>
        </div>
    </div>
    <Foot></Foot>
</template>

<script setup>
//组件
import courseType from "../mixins/coursetype.js";
import { ElMessage } from "element-plus";
import headerVue from "../components/header.vue";
import Foot from "../components/home/Foot.vue";
import {
    reqCoursedatail,
    courseCheckAuth,
    downloadAttachment,
    reqaddshopcart
} from "../api/silder.js";
import { useUserStore } from "../store/user";
import { useRoute } from "vue-router";
let { courseTypeFn } = courseType();
let router = useRouter();
let route = useRoute();
let courseId = route.params.id;
let active = ref(true);
let courseInfo = ref({});
let courseChapters = ref([]);
let attachments = ref([]);

onBeforeMount(() => {
    getCoursedetail();
});

const getCoursedetail = async () => {
    let coursedetailresult = await reqCoursedatail({ courseId });
    courseInfo.value = coursedetailresult.data.data;
    courseChapters.value = coursedetailresult.data.data.bizCourseChapters;
    attachments.value = coursedetailresult.data.data.bizCourseAttachments;
};
const downloadSource = async (item) => {
    if (!useUserStore().token) {
        ElMessage.info({
            message: "请先登录",
        });
        router.push("/login");
        return;
    } else {
        let checkresult = await courseCheckAuth({ courseId: item.courseId });
        if (checkresult.data.data.hasAuth) {
            let downloadresult = await downloadAttachment({
                courseId: item.courseId,
                attachmentId: item.id,
            });
            const blob = new Blob([downloadresult]);
            let fileName = item.attachmentName;
            let fileUrl = item.attachmentUrl;
            const extName = fileUrl.substring(fileUrl.lastIndexOf("."));
            fileName = fileName + extName;
            const link = document.createElement("a");
            link.download = fileName;
            link.target = "_blank";
            link.style.display = "none";
            link.href = URL.createObjectURL(blob);
            document.body.appendChild(link);
            link.click();
            URL.revokeObjectURL(link.href);
            document.body.removeChild(link);
        } else {
            ElMessage.info({
                message: "购买该课程后才能下载资料哦",
            });
            return;
        }
    }
};
const goplay = (item, chapterId) => {
    if (!useUserStore().token) {
        ElMessage.info({
            message: '请先登录'
        });
        router.push('/login');
        return;
    }
    //如果是登录状态
    courseCheckAuth({
        courseId: item.courseId
    }).then(res => {
        //如果没有权限，提醒购买
        if (!res.data.data.hasAuth) {
            ElMessage.info({
                message: '购买该课程才可以学习哦～'
            });
            return;
        }
        //有权限
        router.push({
            path: '/course-play/' + item.courseId + '/' + chapterId,
        })
    })
}

const addCart = async () => {
    let addresult = await reqaddshopcart({
        courseId,
        memberId: useUserStore().userInfo.id
    })
    console.log(addresult);
}
</script>

<style scoped>
.courseContainer {
    width: 100%;
    height: 100%;
    background: #f8fafc;
    overflow: hidden;
}

.main {
    margin: 40px auto;
    width: 1200px;
    height: 100%;
}

.courseInfoTop {
    width: 100%;
    height: 200px;
    background-image: url("../assets/img/courseInfobg1920.png");
}

.nav-container {
    width: 1200px;
    margin: 0 auto;
    color: #333333;
    display: flex;
}

/* .chapter-item  .active{
    color: #388FFF;

} */
/* 背景部分开始 */
.courseInfoTop .info-container {
    margin: 0 auto;
    width: 1200px;
    height: 200px;
    color: #ffffff;
    z-index: 5;
}

.route {
    /*margin-left: 50px;*/
    padding-top: 20px;
    display: flex;
    font-size: 14px;
}

.route .route-item {
    margin-right: 10px;
}

.name {
    margin: 30px 0 10px 0px;
    font-size: 24px;
}

.info {
    display: flex;
    /*margin-left: 50px;*/
}

.info .Avat {
    width: 60px;
    height: 60px;
    border-radius: 50%;
}

.info .Avat img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

.teacherName {
    margin: 8px 0 0 8px;
}

.name-item img {
    width: 14px;
    height: 14px;
}

.access {
    margin: 0 0 0 100px;
    display: flex;
}

.access .access-item {
    margin-right: 10px;
    line-height: 60px;
}

/* 背景部分结束 */

/* 导航栏开始 */
.info-nav {
    width: 100%;

    background: #ffffff;
    box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.16);
}

.course {
    margin: 0 auto;
    width: 1200px;
}

.chapter {
    display: flex;
    font-weight: 600;
    color: #333333;
    margin-left: 50px;
    font-size: 20px;
}

.chapter-item {
    padding-bottom: 8px;
    font-size: 20px;
    font-weight: bold;
    line-height: 80px;
    margin-right: 70px;
    cursor: pointer;
    position: relative;
}

.chapter-item .active1 {
    color: #388fff;
}

.chapter-item .active2 {
    position: absolute;
    width: 70%;
    top: 63px;
    left: calc(30% / 2);
    height: 4px;
    background: #388fff;
    border-radius: 2px;
}

/* 导航栏结束 */
/* 课程介绍开始 */
.introduction {
    /*margin-left: 50px;*/
    /*padding: 20px;*/
    width: 1210px;
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.09);
}

.desc {
    padding: 20px;
    color: #474747;
    line-height: 35px;
}

.btn {
    float: right;
    margin-top: 10px;
    padding: 0 20px 20px;
}

.btn-item {
    width: 120px;
    height: 40px;
    /*margin: 0 20px 0 0;*/
    padding: 0px;
    border: 0px;
    outline: none;
    color: #f11d1d;
    border-radius: 23px;
    cursor: pointer;
}

.btn .active {
    background: #f11d1d !important;
    color: #ffffff;
    margin-right: 10px;
}

/* 课程介绍结束 */

/* 视频目录开始 */
.video {
    margin: 20px 0;
    padding: 20px;
    width: 1170px;
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.09);
}

.video .chapterName {
    font-weight: bold;
    font-size: 20px;
    color: #333333;
}

.video .free {
    padding-left: 20px;
    font-size: 14px;
    color: #388fff;
}

.chapterDesc {
    margin: 10px 0;
    font-size: 13px;
    color: #5c5c5c;
}

.video-item {
    height: 40px;
    line-height: 40px;
    padding: 5px 0;
    /*margin: 0 0 10px 0;*/
    border-radius: 8px;
}

.video-item:hover {
    cursor: pointer;
    background: rgba(53, 133, 255, 0.2);
    border-radius: 8px;
    color: #388fff !important;
}

.video-item .shipin {
    color: #333333;
    font-weight: bold;
}

.video-item .chapterName {
    font-size: 16px;
    font-weight: 400;
    color: #333333;
}

.video-itemIcon,
.item-name {
    float: left;
    padding-left: 10px;
}

.btn-learn {
    margin: 5px 5px 0 0;
    float: right;
    right: -100px;
    width: 80px;
    height: 30px;
    line-height: 30px;
    border: 0px;
    outline: none;
    color: #fff;
    background: #388fff;
    border-radius: 12px;
    cursor: pointer;
}

.clearfloat {
    clear: both;
}

/* 视频目录结束 */
.source {
    margin: 2px 0;
    padding: 5px;
    display: flex;
    justify-content: space-between;
    box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.09);
}

.down {
    margin: 10px auto !important;
    width: 1200px;
    height: 100%;
    padding: 5px;
    background: #ffffff;
    box-sizing: border-box;
    border-radius: 8px;
}

.down:first-child {
    margin: 40px 0 5px 0;
}

.downloadbtn {
    width: 100px;
    height: 30px;
    line-height: 30px;
    background: #388fff;
    border: none;
    border-radius: 8px;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
}
</style>